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Synthetic ZSM-5 Zeolite Molecular Sieve Cas No 308081-08-5 for Fluid Bed Catalytic Cracking Reactor
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| Post Date: | Sep 17,2020 |
| Expiry Date: | Nov 16,2020 |
| Detailed Description: |
Cas No. :308081-08-5
Quantity: 500Kilograms Specs:Mole Ratio:15-1000,Cl-: Max70ppm,SIO4:Max0.4 Price:3.99 USD Kilograms Payment Method: L/C,T/T Synthetic ZSM-5 Zeolite Molecular Sieve Cas No 308081-08-5 for Fluid Bed Catalytic Cracking Reactor The ZSM-5 type zeolite produced by means of a template agent free hydrothermal crystallization method is featured with high relative crystallinity,wherein the relative crystallinity is no less than 90%,the SiO2/Al2O3 molar ration is no less than 25,and the Na2O is no more than 0.1%. ZSM-5 Quality Control Targets Item Unit Max Typical Max Analytical Method Relative crystallinity % 90 93 X-ray diffractometer Total specific surface m2/g 320 360 N2 Adsorption Microporous specific surface m2/g 270 280 N2 Adsorption Silica-alumina ratio / 25 27.5 30 XRF Na2O wt% 0.040 0.1 Flame Photometric Analysis SO42- wt% 0.20 0.4 XRF CI- ppm 70 Chemical Analysis LOI wt% 10 Gravimetric Analysis D,50 μm 6 9 Laser Scatter Distribution D,90 μm 9.0 15 Laser Scatter Distribution >100μm % 0 0.06 Laser Scatter Distribution Na2O Weight %: 0.05 Surface Area, m2/g: 340 Thermal stability High thermal stability of ZSM-5 zeolite. This is caused by a skeleton in a stable five-membered ring structure and a high silica to alumina ratio. For example, the sample calcined at 850 ℃ After 2 hours, the crystal structure unchanged. Even can withstand high temperature of 1100 ℃. So far, ZSM-5 zeolites are known to one of the highest qualitative hot temperature. Therefore, it is used in high-temperature process is particularly suitable. For example, use it as a hydrocarbon cracking catalyst, regeneration of the catalyst can withstand passage of time. Acid resistance ZSM-5 zeolite has good acid resistance, it is resistant to various acids except hydrofluoric acid. Steam stability Wang, IKai other studies have shown that when other zeolites by steam and hot water, and their general structure is destroyed, leading to irreversible deactivation. The Mobil company with ZSM-5 as the conversion of methanol (water is one of the major product) catalyst. This suggests that ZSM-5 to water vapor with good stability. 540 ℃ lower partial pressure of 22mmHg steaming column and HY zeolite HZSM-5 after 24 hours, a crystallinity of HZSM-5 and about 70 percent of fresh catalyst, but under the same conditions, HY zeolite skeleton almost completely damage. Hydrophobic ZSM-5 having a high silica to alumina ratio, the smaller the surface charge density. The water molecule is polar, so you will not ZSM-5 is adsorbed. Although water molecules smaller than the diameter of n-hexane, but the amount of adsorption of n-hexane ZSM-5 is generally greater than water. Easy to coke ZSM-5 V-shaped aperture effective, pore size and bending, preventing a large condensate formation and accumulation. Meanwhile, ZSM-5 framework is no greater than the bore of the cavity (cage) exist, so limiting the formation of large molecules from the secondary condensation reactions. So that the possibility of ZSM-5 catalyst coke is reduced. ZSM-5 for an alkyl aromatics into the tunnel barrier is formed, and thus the reaction process it can not continue to react in smaller pores, the final condensation formed coke. ZSM-5 so much slower than the rate of coke deposition and Y-type mordenite, difference of almost two orders of magnitude. Capacity of ZSM-5 zeolite carbon content is higher. Excellent shape-selective selectivity Zeolite molecular sieve as catalyst, only smaller than the hole crystal molecules can catalyze the reaction out of control pore size crystalline zeolite suffering zeolite catalyst size and shape of reactant and product molecules showed great selectivity. Pore system of ZSM-5 zeolite having a 10-MR constituted medium size orifice diameter, it has a good shape-selective selectivity. |
| CAS Registry Number: | 308081-08-5 |
| Company: | Zibo Jiulong Chemical Co., Ltd. [ China ] |
| Contact: | james.li |
| Tel: | 0533-6076766 +86-13706436189 |
| Fax: | 0533-6076766 |
| Email: | james.li@jiulongchemical.com |
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